EN ISO 15025

Procedure A:
superficial ignition → the burner is placed perpendicular to the fabric surface. Flame is applied for 10 seconds and the following information is observed and recorded:

a) whether the flame reaches the upper border or any border of the sample
b) post-combustion time
c) post-incandescence time
d) if post-incandescence spreads beyond the ignited area
e) peeling of residues
f) whether the residues ignite the filter paper
g) whether a hole forms and in which layer

Procedure B:
Border ignition → the burner is placed in a 30° angle with respect to the vertical axis. The distance between the edge of the burner and the lower border of the fabric must be 20 mm ± 2 mm. The flame is applied for 10 seconds and the previous information should be observed and recorded, except for g).